At Chester Parry was associated with Evan Evans (Ieuan Glan Geirionydd, q.v.) and Y Gwladgarwr. In 1836 he bought the publishing rights after Ieuan himself had suffered financial loss. Hugh Jones (Erfyl) was the editor from 1836 but in 1841 its publication was undertaken by Robert Lloyd Morris at Liverpool. Parry was responsible for the publication of several Welsh books, e.g. Coffhad am y Parch. Daniel Rowlands, by John Owen, 1839, and The Poetical Works of Richard Llwyd, 1837. Parry wrote the memoir which forms the preface to this book, and he also edited and published Blodau Arfon, sef gwaith Dewi Wyn, 1842. He was a successful competitor on historical essays at eisteddfodau. He published Historical Researches on the Flintshire Castles, 1830, which was submitted by him to Denbigh Eisteddfod, 1830, and later his essay Undeb Cymru a Lloegr, 1837, which had been awarded the prize at Tegeingl eisteddfod held at Trelawnyd in 1829. He was well known for his contributions to the topography of the Principality and his authorship of various works for the use of travellers in North Wales; Cambrian Mirror, 1843 (with three other editions); Railway Companion from Chester to Holyhead, 1848 (2nd ed. 1849); Railway Companion from Chester to Shrewsbury. His last and most important work was Royal Visits and Progresses to Wales, which he published in 1850 (2nd ed. 1851). This is a repertory of facts, the collection of which does credit to his painstaking research over many years. He d. 25 March, 1854, and was buried at Chester.